Stripped Brn-4 5.56x45 13.7" Medium Chrome Lined Barrel, Phosphate
$279.99 at Brownells
In stock Sale
AR-15 20" A2 Rifle Barrel 1-7 Assembly - 5.56x45mm 20" A2 Rifle Barrel 1-7 Twist Assembly
No ratings yetBest price
$259.99at Brownells
Out of stock checked Oct 22, 2026
In stock now instead
- Stripped Brn-4 5.56x45 13.7" Medium Chrome Lined Barrel, Phosph… $279.99at Brownells
- Stripped Brn-4 5.56x45 14.5" Medium Chrome Lined Barrel Phospha… $279.99at Brownells
- Rock River Arms 20in STD SS Barrel Assembly Stainless Steel $259.99at OpticsPlanet
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells | $259.99checked Oct 22, 2026 | Out of stock | Buy at Brownells |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
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This part is out of stock at every store we track. These similar barrels are in stock, with today's prices.
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Price history
Dashed line = out of stock. Tracking since Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $259.99 | $259.99 | $259.99 |
Since Sep 28, 2026.
About this part
The AR-15 20" A2 Rifle Barrel 1-7 Assembly - 5.56x45mm 20" A2 Rifle Barrel 1-7 Twist Assembly is a 2E+1" 5.56 / .223 barrel from Brownells with a rifle gas system. One store lists it, Brownells at $259.99.
Fits and works with
- Caliber
- 5.56 / .223 · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
- Gas system
- Rifle · Handguards
- Barrel length
- 2E+1" · Handguards
Specifications
- Manufacturer
- Brownells
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
- Gas system
- Rifle
- Barrel length
- 20"
From the manufacturer
The Brownells Retro A2 rifle length barrel replicates the "Government" profile found on the M16A2. Chambered in 5.56x45, this chrome-lined barrel has a 1-7" twist and is finished in matte black phosphate, with an overall length of 20". The muzzle threads are A 1/2"-28 tpi, and in the back a standard rifle barrel extension is pre-installed. 5.56 NATO chamber (also accepts .223 Rem) Original 1-7" rifling compatible with heavier bullets Chrome-lined bore and chamber Requires a rifle-length gas tube (available separately) M16 barrel extension (no M4 feedramps) Non-F-Marked 0.750 inch front sight base (compatible with carry handle rear sights) Available as a Mfg: Brownells
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